Why not working for all content types?

I just installed and tested it. It worked!

But I wonder, why limiting it to posts and pages? I would have needed it for another content type (Namaste lesson) so that studends could make annotations.

So I had to use the other – more generic format – of a javascipt snippet and to put this code line in every namaste lesson.

I’m sure there would be another, easier workaround, but I’m no programmer. So please make this nice plugin more generic and working with all kind of WP content types.